| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @summary Test CompressIndexes |
| * @author Jean-Francois Denise |
| * @modules java.base/jdk.internal.jimage.decompressor |
| * @run main CompressIndexesTest |
| */ |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import jdk.internal.jimage.decompressor.CompressIndexes; |
| |
| public class CompressIndexesTest { |
| |
| public static void main(String[] args) throws IOException { |
| new CompressIndexesTest().test(); |
| } |
| |
| public void test() throws IOException { |
| int[] data = { |
| // compressed length 1 |
| 0x00000000, |
| 0x00000001, |
| 0x0000000F, |
| 0x0000001F, |
| // compressed length 2 |
| 0x0000002F, |
| 0x00000100, |
| 0x00001FFF, |
| // compressed length 3 |
| 0x00002FFF, |
| 0x00010000, |
| 0x001FFFFF, |
| // compressed length 4 |
| 0x00200000, |
| 0x01000000, |
| Integer.MAX_VALUE |
| }; |
| int[] intervals = {4, 7, 10, data.length}; |
| List<byte[]> arrays = new ArrayList<>(); |
| int length = 0; |
| int begin = 0; |
| for (int interval : intervals) { |
| ++length; |
| for (int j = begin; j < interval; ++j) { |
| arrays.add(check(data[j], length)); |
| } |
| begin = interval; |
| } |
| |
| int totalLength = arrays.stream().mapToInt(b -> b.length).sum(); |
| ByteBuffer all = ByteBuffer.allocate(totalLength); |
| arrays.forEach(all::put); |
| byte[] flow = all.array(); |
| check(flow, arrays); |
| System.err.println(arrays.size() * 4 + " compressed in " + flow.length |
| + " gain of " + (100 - ((flow.length * 100) / (arrays.size() * 4))) + "%"); |
| try (DataInputStream is = new DataInputStream(new ByteArrayInputStream(flow))) { |
| int index = 0; |
| while (is.available() > 0) { |
| int d = CompressIndexes.readInt(is); |
| if (data[index] != d) { |
| throw new AssertionError("Expected: " + data[index] + ", got: " + d); |
| } |
| ++index; |
| } |
| } |
| } |
| |
| private void check(byte[] flow, List<byte[]> arrays) { |
| List<Integer> d = CompressIndexes.decompressFlow(flow); |
| List<Integer> dd = new ArrayList<>(); |
| for (byte[] b : arrays) { |
| int i = CompressIndexes.decompress(b, 0); |
| dd.add(i); |
| } |
| if (!d.equals(dd)) { |
| System.err.println(dd); |
| System.err.println(d); |
| throw new AssertionError("Invalid flow " + d); |
| } else { |
| System.err.println("OK for flow"); |
| } |
| } |
| |
| private byte[] check(int val, int size) { |
| byte[] c = CompressIndexes.compress(val); |
| if (c.length != size) { |
| throw new AssertionError("Invalid compression size " + c.length); |
| } |
| int d = CompressIndexes.decompress(c, 0); |
| if (val != d) { |
| throw new AssertionError("Invalid " + d); |
| } else { |
| System.err.println("Ok for " + val); |
| } |
| return c; |
| } |
| } |